To be able to use the primitive std::generate function, added a
set of wrappers in eoSTLFunctor.h that have the copy semantics most
STL functions expect (namely pass-by-value rather then pass-by-reference).
Updated test/Makefile.am to also test t-eoRandom
Also: introducing eoRndGenerators.h for eoRndGenerator derived classes:
eoNormalGenerator
eoUniformGenerator
eoBooleanGenerator
eoNegExpGenerator
Note the suffix that are added to aid in determining what these classes do